To a large extent, we struggle to understand ourselves through others; we look at other people’s behaviour and models of the world, and (perhaps too quickly) decide how they relate to ours. When someone reflects our own biases, we are happy and feel attraction; they have reinforced the peculiar script we are living out, and we need not, for a while, be quite so much on our guard. Sufferers of psychological conditions present rather more eccentric models of thinking yet are generally ruled by something that also stirs within us in embryonic form.

